LED bulb



FIG. 1 is a perspective view of a first embodiment of an LED bulb;

FIG. 2 is a side view of the first embodiment;

FIG. 3 is a top view of the first embodiment; and,

FIG. 4 is a bottom view of the first embodiment.

The broken lines are for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for an LED bulb, as shown and described. 